Roller construction module having an error prevention structure
US6967293B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 21, 2004 |
| Grant date | Nov 22, 2005 |
| Priority date | — |
| Expiry date | Jul 21, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2019/146
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention is a roller construction module having an error prevention structure, comprising a base; a roller disposed in said base; two terminals at two opposite ends of the base to be electrically connected with a metal ring in the roller; a first and a second plungers on the bottom surface of the base; a post between the first and the second plungers; a third plunger on the position at the opposite side to the post on the bottom surface; and a first and a second protecting rods at two opposite ends near the third plunger. Based on the above-said structure, the switch at the left or the right side of the roller construction module can be respectively activated, and another switch, at the middle area of the mobile device, can be prevented from being activated simultaneously so that error prevention is achieved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.